PROBLEM TO BE SOLVED: To provide a panel holding tool for a plant cultivation device which is capable of holding a panel that constitutes a cultivation bed by using a cultivation rack near an operator.SOLUTION: A panel holding tool 20 for a plant cultivation device holds a single panel 12 that constitutes a cultivation bed which covers an upper end opening of a cultivation tank which is mounted on a mounting part of a cultivation rack and pools nutritious liquid for hydroponics. The panel holding tool 20 for a plant cultivation device comprises: a holding part 21 which freely detachably holds the panel 12 in a separated state from a floor surface on which the cultivation rack is installed; and an attaching part 22 which is fixed to the holding part 21 and freely detachably attached to a horizontal rail 8 arranged on the working surface of the cultivation rack. The holding part 21 has a fixed length in a longer direction of the horizontal rail 8 arranged on the working surface of the cultivation rack, is open to an operator side, and has a panel fitting groove 23 extending over the entire length of the holding part 21.SELECTED DRAWING: Figure 4【課題】栽培床を構成するパネルを、作業者の近くで栽培ラックを利用して保持させることができる植物栽培装置用パネル保持具を提供する。【解決手段】植物栽培装置用パネル保持具20は、栽培ラックの載置部上に載せられかつ水耕栽培用養液を貯留する栽培槽の上端開口を塞ぐ栽培床を構成する1枚のパネル12を保持する。植物栽培装置用パネル保持具20は、パネル12を栽培ラックが設置される床面から離れた状態で着脱自在に保持する保持部21と、保持部21に固定され、かつ栽培ラックの前記作業面に配置された横桟8に着脱自在に取り付けられる取付部22とを備えている。保持部21は、栽培ラックの前記作業面に配置された横桟8の長手方向に一定の長さを有するとともに、作業者側に開口し、かつ保持部21の全長にわたるパネル嵌入溝23を有している。【選択図】図4